Microstructural characterization and wear properties of ultra-dispersed nanodiamond (UDD) reinforced Al matrix composites fabricated by ball-milling and sintering

H. Kaftelen*, M. L. Öveçoǧlu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

Elemental aluminum (Al) powders reinforced with 1-10 - wt% of ultra-dispersed nanodiamond (UDD) powders were ball-milled in a SpexTM Mixer/Mill between 0 and 120 - min followed by consolidation and sintering. X-ray diffraction analyses on the ball-milled powders revealed only α-Al peaks, wherea Al 4C 3 phase was identified along with α-Al in all sintered composites. Increasing the addition of nanodiamond to Al-matrix resulted in improved hardness of both ball-milled and sintered composites. The wear resistances of the Al-UDD composites were significantly improved with increasing UDD contents. Under similar load and sliding conditions, the wear resistance of Al matrix composite containing 10 - wt% nanodiamond enhances about 40 times when compared with unreinforced aluminum.

Original languageEnglish
Pages (from-to)1521-1534
Number of pages14
JournalJournal of Composite Materials
Volume46
Issue number13
DOIs
Publication statusPublished - Jun 2012

Funding

This research is financially supported by State Planning Organization (DPT) of Turkey under the Project Title ‘Development of Al and Cu Based Metal Matrix Composites Using Mechanical Alloying Techniques’ with the project number 90189 and this is gratefully acknowledged. The authors wish to thank Professor Hüseyin Çimenoğlu for his valuable comments and discussions on the wear results of this study. The authors are thankful to Mr. Talat Tamer Alpak for helping during the SEM investigations and Mr. Mert Günyüz for his help during the wear experiments.

FundersFunder number
Cu Based Metal Matrix Composites Using Mechanical Alloying Techniques90189
DPT
Devlet Planlama Örgütü

    Keywords

    • Al metal-matrix composites (AMMCs)
    • ball-milling
    • microstructure
    • nanodiamond powders

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